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National Stock Number:
3120-00-798-1014
Federal Supply Class:
3120
National Item Identification Number:
007981014
Description:
BEARING,WASHER,THRUST
Detail:
An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also WASHER, FLAT and SPACER, SLEEVE.
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Manufacturer Information:
| 7981014 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | MILB13501 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| MATERIAL | COPPER ALLOY 411 OVERALL | | STYLE DESIGNATOR | ROUND | | OUTSIDE DIAMETER | 7.3750 INCHES NOMINAL | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | OVERALL THICKNESS | 0.2500 INCHES NOMINAL | | CENTER HOLE SHAPE STYLE | ROUND | | DIAMETER | 5.0020 INCHES MINIMUM AND | | 5.0060 INCHES MAXIMUM | | SURFACE FINISH | 125.0 MICROINCHES OVERALL | | LUBRICATION FEATURE | GROOVE FLAT BEARING SURFACE | | NONDEFINITIVE SPEC/STD DATA | 1 TYPE AND | | A COMPOSITION | | CRITICALITY CODE JUSTIFICATION | ABMZ | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 81349 | | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MILB13501 |
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